Know Your Environment. Protect Your Health.

Selenium

Harbour Point S/d

NOTE: Harbour Point S/d purchases water from Town of Mooresville which is required to test for selenium. Sample information shown below was taken by Town of Mooresville.

Selenium is an essential element in diets. But too much selenium can decrease thyroid hormone production and cause hair loss, skin lesions and brittle fingernails.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND30ND
2020ND40ND
2021ND30ND
2022ND30ND
2023ND20ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 30 ppb

The EWG Health Guideline of 30 ppb for selenium was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against hair loss and nail damage.

EPA Maximum Contaminant
Level (MCL): 50 ppb

The legal limit for selenium, established in 1991, was based on human epidemiological studies of populations exposed to naturally occurring selenium in drinking water. This limit does not include any additional consideration of children’s health.

ppb = parts per billion

All test results

NOTE: Harbour Point S/d purchases water from Town of Mooresville which is required to test for selenium. Sample information shown below was taken by Town of Mooresville.

Date Lab ID Result
2018-07-1153283-02ND
2018-07-1153284-03ND
2019-07-1069273-04ND
2019-07-1069274-04ND
2020-07-0884398-06ND
2020-07-0884399-05ND
2021-07-131813-21ND
2021-07-131814-21ND
2022-07-131884-22ND
2022-07-131889-22ND
2022-07-132004-22ND
2022-07-132005-22ND
2023-07-122169-23ND
2023-07-122173-23ND